Playing lower ranked players won't move you up or down as quickly as playing equally ranked players.
When a higher ranked player plays a lower ranked player they seldom bring the same game to the table they would if their opponent was equally rated and therefore they don't play to their full potential which is not a true measure of performance. Unfortunately, we've all had this experience.

About new players:
You were once a new player and someone probably complained about your rating. It may not have been very accurate because only a minimal amount of data was collected. It takes time to establish a solid rating. A minimum of 10 weeks of scores is required because it is averages that create the handicap.

Most player audits come in from players that have lost their match.
Ask yourself. Did I shoot my best game?
Sometimes it's not that your opponent is under ranked, but rather that you didn't shoot your normal game or your opponent was shooting their best game or a little better than normal. Just because a player has a couple of good weeks, doesn't mean they should automatically be raised. Those strong scores are averaged with all their other scores. The strong scores do push them closer to the next level, but it takes time. Your assessment of someone's rating can not be based on one experience with that player. It must be based on the entire history of the player, which is impossible to do unless you play them every week. This is not intended to discourage player audits. We still need those to insure the accuracy of the league scoring system and to prevent sandbagging.

Bad score keeping leads to inaccurate handicapping.
The system can only calculate the data entered. Inaccurate data comes from score sheets that are illegible or filled out incorrectly. Please check the accuracy of your score sheets before turning them in to insure proper data entry. I hope this helps all of you understand the scoring system a little better.